Changed the color of (4)
I believe the answer is:
dyed
'changed the color of' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for dyed that I've seen before include "Cloth is often" , "Stained - coloured" , "A shade unnatural" , "Changed the colour of fabric" , "Given a new colour" .)